19645405

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{347}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 25983072

約数和(自身を除く): 6337667

約数列:

[1, 5, 13, 65, 67, 169, 335, 347, 845, 871, 1735, 4355, 4511, 11323, 22555, 23249, 56615, 58643, 116245, 293215, 302237, 1511185, 3929081, 19645405]

約数ペア:

[(1, 19645405), (5, 3929081), (13, 1511185), (65, 302237), (67, 293215), (169, 116245), (335, 58643), (347, 56615), (845, 23249), (871, 22555), (1735, 11323), (4355, 4511)]